Trucks running too cold. Besides thermostats, could anything else be the cause? 2000 Freightliner Classic. 12.7. Here’s a pic idling. 21 degrees out. Gets a little bit colder going down the road. Even at 50 degrees outside temp. New 190 thermostats, New radiator, fans not running. Kicks on normally, though a bit early, just below 200 in summertime. I think sensors good, and gauge is accurate, judging by the heat in cab. I must have a thermostat stuck open. Any ideas of other causes?
2000 Freightliner 12.7 operating temp. Running too cold.
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Rideandrepair, Feb 10, 2021.
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Mine also were at 180, I decided to do preventative maintenance on both trucks and replaced them with new based on the engine serial. Now the temp stays at 170 on both trucks. I don't think there is anything to worry about.
Maybe the newly made thermostats are just differentRideandrepair Thanks this. -
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